Soil salinization in coastal Bangladesh is a growing environmental stressor that threatens smallholder agriculture, food security, and the sustainability of land use systems in one of the world's most densely populated and climate vulnerable regions. However, currently salinity assessments remain spatially coarse and temporally outdated across the region, limiting efforts to design targeted, context specific adaptation strategies for farmers. This study addresses this gap by integrating existing remote sensing datasets with ground truth soil salinity measurements to map and analyze salinity dynamics in two village sub districts within Khulna and Barisal. By combining GPS referenced soil samples with multiyear land use/land cover change data, we assess how salinity shifts intersect with key indicators of agricultural transformation, including cropland conversion and fallow land expansion. Our findings highlight how environmental stressors like salinity reshape land use patterns, influencing the viability of traditional cropping systems. These insights can into broader landscape level changes and informing strategies for adaptive land management in salinity affected regions.